mirror of
https://github.com/edk2-porting/linux-next.git
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138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
/* Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* max98357a.c -- MAX98357A ALSA SoC Codec driver
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*/
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/gpio/consumer.h>
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#include <linux/kernel.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <sound/soc-dai.h>
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#include <sound/soc-dapm.h>
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static int max98357a_daiops_trigger(struct snd_pcm_substream *substream,
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int cmd, struct snd_soc_dai *dai)
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{
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struct gpio_desc *sdmode = snd_soc_dai_get_drvdata(dai);
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if (!sdmode)
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return 0;
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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gpiod_set_value(sdmode, 1);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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gpiod_set_value(sdmode, 0);
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break;
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}
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return 0;
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}
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static const struct snd_soc_dapm_widget max98357a_dapm_widgets[] = {
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SND_SOC_DAPM_OUTPUT("Speaker"),
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};
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static const struct snd_soc_dapm_route max98357a_dapm_routes[] = {
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{"Speaker", NULL, "HiFi Playback"},
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};
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static int max98357a_codec_probe(struct snd_soc_codec *codec)
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{
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struct gpio_desc *sdmode;
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sdmode = devm_gpiod_get_optional(codec->dev, "sdmode", GPIOD_OUT_LOW);
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if (IS_ERR(sdmode))
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return PTR_ERR(sdmode);
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snd_soc_codec_set_drvdata(codec, sdmode);
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return 0;
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}
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static struct snd_soc_codec_driver max98357a_codec_driver = {
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.probe = max98357a_codec_probe,
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.dapm_widgets = max98357a_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(max98357a_dapm_widgets),
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.dapm_routes = max98357a_dapm_routes,
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.num_dapm_routes = ARRAY_SIZE(max98357a_dapm_routes),
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};
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static const struct snd_soc_dai_ops max98357a_dai_ops = {
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.trigger = max98357a_daiops_trigger,
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};
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static struct snd_soc_dai_driver max98357a_dai_driver = {
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.name = "HiFi",
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.playback = {
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.stream_name = "HiFi Playback",
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.formats = SNDRV_PCM_FMTBIT_S16 |
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SNDRV_PCM_FMTBIT_S24 |
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SNDRV_PCM_FMTBIT_S32,
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.rates = SNDRV_PCM_RATE_8000 |
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SNDRV_PCM_RATE_16000 |
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SNDRV_PCM_RATE_48000 |
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SNDRV_PCM_RATE_96000,
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.rate_min = 8000,
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.rate_max = 96000,
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.channels_min = 1,
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.channels_max = 2,
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},
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.ops = &max98357a_dai_ops,
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};
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static int max98357a_platform_probe(struct platform_device *pdev)
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{
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return snd_soc_register_codec(&pdev->dev, &max98357a_codec_driver,
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&max98357a_dai_driver, 1);
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}
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static int max98357a_platform_remove(struct platform_device *pdev)
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{
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snd_soc_unregister_codec(&pdev->dev);
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return 0;
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}
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#ifdef CONFIG_OF
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static const struct of_device_id max98357a_device_id[] = {
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{ .compatible = "maxim,max98357a" },
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{}
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};
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MODULE_DEVICE_TABLE(of, max98357a_device_id);
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#endif
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static struct platform_driver max98357a_platform_driver = {
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.driver = {
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.name = "max98357a",
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.of_match_table = of_match_ptr(max98357a_device_id),
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},
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.probe = max98357a_platform_probe,
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.remove = max98357a_platform_remove,
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};
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module_platform_driver(max98357a_platform_driver);
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MODULE_DESCRIPTION("Maxim MAX98357A Codec Driver");
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MODULE_LICENSE("GPL v2");
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